size: 130mm x 32mm // weight: cca. 180g



Moonsyst Smart Rumen Bolus reliably monitors the changes in pH value of the rumen of a cattle in a continuous and animal friendly manner.

Moonsyst Smart Rumen pH Bolus features:

With an accuracy of +-0.2pH for 90 days
(validated by the VetUni Budapest)
details on request

Records Rumen Temp & Activity

Automatic data collection from the boluses with 200 m - 500 m communication range between the cows and the gateway

Built-in memory if the cow is out of the covered area

Cloud-based software with charts and alerts

Plug ‘n’ play gateway with SIM card also for rent

Raw data available for download

No need for manual sampling

Boluses shipped precalibrated, ready to use - no hassle at the field

Oxidation-reduction potential (ORP)

Used in fistulated (and non-fistulated) cattle

Screen from the system:
Continuous rumen pH measurements from a Holstein cow over one day. Time spent under the critical 5,8pH was more than 9 hours.


Sub-acute ruminal acidosis (SARA), also known as chronic or sub-clinical acidosis, is a well-recognized digestive disorder that is an increasing health problem in most dairy herds. Results from field studies indicate a high prevalence of SARA in high-producing dairy herds as producers respond to the demands for increased milk production with higher grain, lower fibre diets that maximize energy intake during early lactation.

The economic cost associated with SARA can be staggering. It is estimated that SARA costs the North American dairy industry between $500 million and $1 billion (U.S.) annually, with the costs per affected cow estimated at $1.12 (U.S.) per day. The challenge for dairy farmers and dairy nutritionists is to implement feeding management and husbandry practices that prevent or reduce the incidence of SARA, even in high-producing dairy herds where higher levels of concentrate are fed to maximize energy intake.

Click for more information


We are proud that we have customers from over 25 countries using our system. Our clients are from multinational, universities and research institutes. Published case studies available on request.

As farmers become more knowledgeable on animal nutrition, providing tangible evidence to see the benefits of the offered feed additives has become essential. By monitoring the pH level in a sample of animals before and after, companies can demonstrate the positive impacts of their products. Such quantifiable information will help feed and nutrition companies increase sales.